docs(design): 删除磁盘监控设计文档并更新前端页面结构规范

- 删除 frontend/src/views/systemMonitor/2026-04-22-disk-monitor-design.md 设计文档
- 删除 frontend/src/views/tools/addLedger/API_DEBUG.md 调试文档
- 在 AGENTS.md 中新增前端页面结构归档章节，规范复杂工具页结构
- 明确 index.vue、components/、utils/ 职责边界和拆分原则
- 规定页面级类型和 contract 脚本管理方式
- 统一复杂页面拆分优先顺序和注意事项

frontend/src/views/tools/addData/utils/taskPayload.ts

@@ -0,0 +1,24 @@
+import type { AddData } from '@/api/tools/addData/interface'
+
+const normalizeLineIds = (lineIds: string[]) => {
+    return Array.from(
+        new Set(
+            (lineIds || [])
+                .map(item => item?.trim())
+                .filter((item): item is string => Boolean(item))
+        )
+    )
+}
+
+export const buildTaskPayload = (form: AddData.TaskFormModel): AddData.TaskRequestParams => {
+    return {
+        lineIds: normalizeLineIds(form.lineIds),
+        startTime: form.startTime,
+        endTime: form.endTime,
+        intervalMinutes: form.intervalMinutes
+    }
+}
+
+export const buildPayloadSignature = (payload: AddData.TaskRequestParams) => {
+    return JSON.stringify(payload)
+}